Scientific American Supplements Volume 52, Issue 1341supp

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Features

How to Interpret the Facts of Geology

Mount Ætna

Sven Hedin's Exploration in Central Asia

The Erosive Action of the Mississippi

The “Peache” High-Speed Engine at the Glasgow Exhibition

Gold Supply and History

Machine for Raising Water by the Method of Archimedes' Screw

The Liverpool Motor-Vehicle Trials

The Progress of Science

By R. S. Woodward

Experiments with Sound Signals

The Scale Insect and Mite Enemies of Citrus Trees

By C. L. Marlatt

How Arctic Animals Turn White

By R. Lydekker

Photographic Novelties

Development of the Kentucky Asphalt Deposits

Electrically-Operated Pumps

By Frank C. Perkins

Selected Formulæ

Contemporary Electrical Science

Trade Suggestions from United States Consuls

Trade Notes and Receipts

Patents!

Departments

Purchase To Read More

?Read or download this issue’s articles online. *A printed copy of this issue is not included.

?Read or download this issue’s articles online. Plus, subscribe to get Online and Tablet access to the next 12 new issues to be released as well as Online access to up to the past 4 years of archives. *A printed copy of this issue is not included.

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www.springernature.com/us). Scientific American maintains a strict policy of editorial independence in reporting developments in science to our readers.